How to make delete button in Django

Question

Help me please to understand how to make the delete button, its must to delete a Cat

class Cat(models.Model):
    class Meta():
        db_table = "cat"

    paw = models.IntegerField(default=4)
    name = models.CharField(max_length=30, null=False, default='Cat')
    age = models.IntegerField(default=False, null=False)
    species = models.CharField(max_length=50, blank=True)
    hairiness = models.IntegerField(default=False, null=False)

    def __str__(self):
        return self.name

This is my views.py, hope you can help. (it's need for my job interview on Monday)

from django.shortcuts import render, get_object_or_404
from .models import Cat
from .forms import CatForm
from django.shortcuts import redirect

def home(request):
    template = "base.html"
    queryset = Cat.objects.all()
    context = {
        "object_list": queryset
    }
    return render(request, template, context)

def new_cat(request):
    if request.method == "POST":
        form = CatForm(request.POST)
        if form.is_valid():
            cat = form.save(commit=False)
            cat.save()
            return redirect('/', pk=cat.pk)
    else:
        form = CatForm()
    return render(request, 'new_cat.html', {'form': form})

def cat_edit(request, pk):
    cat = get_object_or_404(Cat, pk=pk)
    if request.method == "POST":
        form = CatForm(request.POST, instance=cat)
        if form.is_valid():
            cat = form.save(commit=False)
            cat.save()
            return redirect('/', pk=cat.pk)
    else:
        form = CatForm(instance=cat)
    return render(request, 'new_cat.html', {'form': form})

site is asc to addd more details, but i just don't know what else, i can add.

from django.conf.urls import url
from . import views


urlpatterns = [
    url(r'^$', views.home, name='home'),
    url(r'^new/$', views.new_cat, name='new_cat'),
    url(r'^edit/(?P<pk>[0-9]+)/$', views.cat_edit, name='cat_edit'),
]

you can try do the same as your cat_edit, show you view, please — user8060120
– user8060120, Commented Sep 1, 2017 at 15:03

wencakisa · Accepted Answer · 2017-09-01 19:26:42Z

At first, you should create a cat_delete view, which should look something like this:

def cat_delete(request, pk):
    cat = get_object_or_404(Cat, pk=pk)  # Get your current cat

    if request.method == 'POST':         # If method is POST,
        cat.delete()                     # delete the cat.
        return redirect('/')             # Finally, redirect to the homepage.

    return render(request, 'template_name.html', {'cat': cat})
    # If method is not POST, render the default template.
    # *Note*: Replace 'template_name.html' with your corresponding template name.

Then, you should map this view in your urls.py:

from django.conf.urls import url
from . import views

app_name = 'cats'
# Note that app_name is added here!
# It is used as a namespace in order to reverse your urls better.
# See usage in template.

urlpatterns = [
    # ...
    url(r'^delete/(?P<pk>[0-9]+)/$', views.cat_delete, name='cat_delete')
]

In your template, you should create a form with delete button, which will simply send a POST request to the delete view:

<form action="{% url 'cats:cat_delete' cat.id %}" method="post">
    {% csrf_token %}
    <input type="submit" value="Delete cat">
</form>

Look closely on the form's action:

{% url 'cats:cat_delete' cat.id %}

Here I am using the app_name from urls.py that I previously added in order to resolve your urls by name, not by path. Now cats:cat_delete will evaluate to cats/delete/<pk>. And of course you pass the cat.id.

This should do the trick with deleting instance of your Cat model. Hope I helped.

Thank you very much, for your help and really big answer, now i understand my mistake))

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